Kīlauea volcano eruption fosters algae bloom in North Pacific Ocean

Pumping nutrient rich water from the deep ocean to the surface is one proposed way of increasing ocean productivity to repair fish stocks and sequester carbon.<p>This volcano has provided a natural demonstration of this effect.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Ocean_fertilization" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Ocean_fertilization</a>

very interesting! could someone explain why the hot water would lead to deep, cold water being brought to the surface? I thought hot water is less dense than cold water. Wouldn&#x27;t it just sit on the surface for a long time?<p>Or is there just such a large amount of this extremely hot water that the mixing overtime generates movement across the board?